- #1
zhenyazh
- 56
- 0
Hi,
i am preparing for a test and have some problem with the following question.
A moving 2.40 kg block collides with a horizontal spring whose spring constant is 400 N/m.
The block compresses the spring a maximum distance of 5.00 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.450. What is the work done by the spring in bringing the block to rest?
so to find the work done by the spring i should use
w=f*x and in this case since the the force is not constant i should use an integral
of f along the path.
but the result i get is wrong. this i probably because i don't address the friction here.
i just don't know where to push it and i am not sure i should.
if i do the integral until 0.05m that means i implicitly address friction, because if
it were not for it the block would have had a larger trajectory.
can u help?
an image is attached
thanks
i am preparing for a test and have some problem with the following question.
A moving 2.40 kg block collides with a horizontal spring whose spring constant is 400 N/m.
The block compresses the spring a maximum distance of 5.00 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.450. What is the work done by the spring in bringing the block to rest?
so to find the work done by the spring i should use
w=f*x and in this case since the the force is not constant i should use an integral
of f along the path.
but the result i get is wrong. this i probably because i don't address the friction here.
i just don't know where to push it and i am not sure i should.
if i do the integral until 0.05m that means i implicitly address friction, because if
it were not for it the block would have had a larger trajectory.
can u help?
an image is attached
thanks